//
// Created by 吴锐 on 2022/2/25.
//

#include "iostream"

using namespace std;

class Person {
private:
    static int m_B;

public:
    static int m_A;
};

int Person::m_A = 100;

void test01() {
    Person p;
    cout << p.m_A << endl;

    Person p2;
    p2.m_A = 200;
    cout << p.m_A << endl;
}

void test02() {
    cout << Person::m_A << endl;
}

int main() {
//    test01();
    test02();
    return 0;
}